Cannot Overclock with my GA-X48-DQ6 & Q9550 E0

[Virtue]

I have tried the setting demonstrated by one of the experience person but I could not overclock my computer. When I have done with BIOS setting and reboot it then it automatically return to BIOS setting. With the new setting it is unsuccessful even in booting.Can you provide any solution to get rid of this issue? My computer specifications are given below:

Processor:Intel Core 2 Quad Q9950
Motherboard: Gigabyte GA-X48-DQ6
PSU Epsilon 1010W
RAM: 6GB DDR2 "2GBx1GBx2GBx1GB"
Graphic: nVidia Geoforce 8800GTS 512MB
OS:Windows 7 x64
Case: Gigabyte 3D Mercury
Hard disk:3 Sata HDD
External HDD:2 External USB HDD
2 DVD Writer
1 CD Writer
Dual Monitor

[lorenz]

Can you give the following details so that we can help you to solve your problem.
1]Detail of your memory ,model, specifications, bandwidth and etc?
2]Full current BIOS setting so that we can see where you are doing mistake in BIOS setting and where you are suppose to do changes
3]BIOS version as well

[Virtue]

1)DDR2 Desktop Memory Module Series
Specification: 240-pin DDR2 667MHz un-buffered DIMM
Configuration: 64Mx8, 128Mx8
Bandwidth: 667MHz: 5.3GB/sec, 800MHz: 6.4GB/sec
Voltage: 667MHz / 800MHz: JEDEC Standard 1.8V
CL: 667MHz / 800MHz: 5
Capacity : 512MB / 1GB / 2GB

2)GIGABYTE GA X48 DQ6 Clock Settings

Robust Graphics Booster: standard
CPU Clock Ratio: 8.0
CPU Frequency: 4.00 Ghz
CPU Host Clock Control: Enabled
CPU Host Frequency(Mhz): 421
PCI Express Frequency (Mhz): 80
Performance Enhance: standard
System Memory Multiplier (SPD): 2.00D
Memory Frequency(Mhz): 840Mhz
DRAM Timing Selectable :Auto
Standard Timing Control
CAS Latency Time (tCL): 6
DRAM RAS# to CAS# (tRCD): 6
DRAM RAS# Precharge (tRP): 5
Precharge Delay (tRAS)............: 18
Advanced Timing Control
ACT to ACT Delay(tRRD): auto
Rank Write to READ Delay (tWTR): manual
Write To Precharge Delay (tWR): auto
Refresh to ACT Delay (tRFC):manual
Read To Precharge Delay (tRTP): auto
Static tREAD Value (tRD): manual
Static tREAD Phase Adj: Auto
Command Rate (CMD): manual
Clock Driving and Skew Control
CPU/PCIEX Clock Driving Control: 750mv
CPU Clock Skew Control: 100ps
(G)MCH Clock Skew Control.: normal
System Voltage Control :Auto
DDR2 OverVoltage Control: normal
PCI-E OverVoltage Control: +0.18v
FSB OverVoltage Control. +0.38v
(G)MCH OverVoltage Control: +0.450v
CPU GTLREF1 Voltage: normal
line Calibration: disable
Normal CPU Vcore: 1.2200v
Limit CPUID Max to 3: Disabled

3)Current BIOS version: F6

[Omari]

Settings for 4ghz on GA-X48-DQ6 & Q9550 E0:
GIGABYTE GA X48 DQ6 Clock Settings
MB Intelligent Tweaker (MIT)
Robust Graphics Booster: Standard
CPU Clock Ratio: 8.0
CPU Frequency: 4.00 Ghz
CPU Host Clock Control: Enabled
CPU Host Frequency(Mhz): 450
PCI Express Frequency (Mhz): 100
C.I.A.2: Disabled
Performance Enhance: Standard
System Memory Multiplier (SPD): 2.00D
Memory Frequency(Mhz): 940Mhz
DRAM Timing Selectable: Manual

Standard Timing Control
tCL: 5
tRCD: 5
tRP: 5
tRAS: 15

Advanced Timing Control
ACT to ACT Delay(tRRD): auto
Rank Write to READ Delay (tWTR): auto
Write To Precharge Delay (tWR): auto
Refresh to ACT Delay (tRFC): auto
Read To Precharge Delay (tRTP): auto
Static tREAD Value (tRD): auto
Static tREAD Phase Adj: Auto
Command Rate (CMD): auto

Clock Driving and Skew Control
CPU/PCIEX Clock Driving Control: 800mv
CPU Clock Skew Control: 100ps
(G)MCH Clock Skew Control. normal
System Voltage Control: Manual
PCI-E OverVoltage Control: +0.15v
FSB OverVoltage Control: +0.35v
(G)MCH OverVoltage Control: +0.475v
CPU GTLREF1 Voltage: normal
CPU GTLREF2 Voltage: -3%

Limit CPUID Max to 3: Disabled
No-Execute Memory Protect: Disabled
CPU Enhanced Halt(CIE): Disabled
CPU Thermal Monitor 2: Disabled
CPU EIST Function: Disabled

[JAMES_911]

I was also unable to overclock GA-X48-DQ6 & Q9550 E0. I have upgraded my BIOS to F8D and follow the settings you have given but idi not get any benefit from it. currently I am having stock cooler with Gigabyte 3D mercury case. I want to know why I am unable to overclock?

[SUpER CoP]

You are missing mixed memory speed and size. I would suggest you to use only one set 2x2GB will be best if you need memory. You can try this settings for 3.2GHz using the 2x2 kit:
Robust Graphics Booster: FAST
CPU Clock Ratio : 8
Fine Clock Ratio :0.5
CPU Host Clock Control:Enabled
CPU Host Frequency (MHz): 399 or 401
PCI Express Frequency (Mhz):100
C.I.A. 2isabled
System Memory Multiplier (SPD): 2.00B or D = 800MhzDRAM Timing
Selectable SPD :Manual

Performance Enhance : Standard

CAS Latency Time: 5
Dram RAS# to CAS# Delay: 5
Dram RAS# Precharge Delay:5
Precharge Delay (tRAS):18

ACT to ACT Delay (tRRD): 3-4
Rank Write to READ Delay:3-6
Write to Precharge Delay: 4-8
Refresh to ACT Delay: 52-62
Read to Precharge Delay: 3-5
Static tRead Value:6-8
Static tRead Phase Adjust: Auto

System Voltage Control: Manual
DDR2 OverVoltage Control:+0.300V = 2.1V
PCI-E OverVoltage Control: Auto
FSB OverVoltage Control:+0.1V
(G)MCH OverVoltage Control: +0.2-0.3V
CPU Voltage Control:1.25
No-Execute Memory Protect: Enabled
CPU Enhanced Halt (C1E): Disabled
C2/C2E State Support: Disabled
x C4/C4E State Support: Disabled
CPU Thermal Monitor 2(TM2): Enabled
CPU EIST Function: Disabled
Virtualization Technology: Disabled

[.:MUNDITO:.]

I just follow the steps being mentioned by you and now I am getting CPU overclock and it reached to 3.65GHZ with fsb of 420. Thank you for your rely to do changes in settings. I run prime95 to check the stability and nothing happened within 1 hour, instead one of the core speed reaches to 71. But I have one doubt does overclocking will effect to my computer life age?

[Viceman]

71C is the limit set by the intel for core 2 and it is very hot as you are getting the maximum.With my Q9450 default speed 2.66GHz now I am getting 3.5GHz and getting only 60C but ambient temperature is something around 20-25Cx which is lower as compare your I think at your location gets too hot even with air conditioning.Putting more voltage and temperature will lower the lifetime of CPU. If you keep your temperature as low as possible then this woulds will help you to get your temp life max. Pr4ime95 is not the most suggested software as other generate much heat such as IntelBurn test.